Question number 87 OG12

87. Is the number of seconds required to travel d1 feet at
r1 feet per second greater than the number of seconds
required to travel d2 feet at r2 feet per second?
(1) d1 is 30 greater than d2.
(2) r1 is 30 greater than r2.

Please let me know why the Answer is E???

the question is to find whether t1 > t2.

Each statement alone is not sufficient
looking the two statements together: d1= d2+30 and r1= r2+30
=> d1/r1 = (d2+30)/(r2+30) which is same as the ratio d2/r2
=> t1=t2 ; therefore the answer is C.

Please explain why the naswer is E

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Jim@StratusPrep: MBA Admissions Consultant; Posts: 2279; Joined: Fri Nov 11, 2011 7:51 am; Location: New York; Thanked: 660 times; Followed by:266 members; GMAT Score:770

by Jim@StratusPrep » Mon Sep 03, 2012 5:01 pm

Try and example where d1 > r1 and an example where d1 < r1, this is how you get e.

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Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pm; Location: Milpitas, CA; Thanked: 1854 times; Followed by:523 members; GMAT Score:770

by Anurag@Gurome » Tue Sep 04, 2012 12:23 am

mrapaka wrote:87. Is the number of seconds required to travel d1 feet at
r1 feet per second greater than the number of seconds
required to travel d2 feet at r2 feet per second?
(1) d1 is 30 greater than d2.
(2) r1 is 30 greater than r2.

Please let me know why the Answer is E???

the question is to find whether t1 > t2.

Each statement alone is not sufficient
looking the two statements together: d1= d2+30 and r1= r2+30
=> d1/r1 = (d2+30)/(r2+30) which is same as the ratio d2/r2
=> t1=t2 ; therefore the answer is C.

Please explain why the naswer is E

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